Bibliographic Information
- Other Title
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- アオバズク<i>Ninox scutulata</i>の齢の識別について
- アオバズクNinox scutulataの齢の識別について
- アオバズク Ninox scutulata ノ レイ ノ シキベツ ニ ツイテ
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Abstract
Age determination of Brown Hawk-Owl Ninox scutulata was carried out based on the following: mistnet-captured owls in Tochigi and Niigata Prefecture, central Japan; the images of specimens in Yamashina Institute for Ornithology; and images found in books and websites. The juveniles have tapered rectrices with a broad pale fringe that is as wide as the inner pale bands. The adults, however, have broad, rounded rectrices with a narrow whitish fringe. The juveniles molt body feathers without fright-feathers and rectrices in autumn; therefore, the rectrices are useful in age determination until complete molt the following summer.
Journal
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- The Bulletin of the Japanese Bird Banding Association
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The Bulletin of the Japanese Bird Banding Association 28 (1), 22-28, 2016
The Japanese Bird Banding Association